---
id: CVE-2026-75856
title: >-
  CodeWhale before 0.8.64 contains a server-side request forgery bypass
  vulnerability in DNS pinning logic that fails to prevent
  time-of-check-time-of-use attacks
summary: >-
  CodeWhale before 0.8.64 contains a server-side request forgery bypass
  vulnerability in DNS pinning logic that fails to prevent
  time-of-check-time-of-use attacks. Attackers can manipulate DNS responses to
  fail initial resolution checks an…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-918
vendor: deepseek-tui
product: deepseek-tui
affected:
  - 'deepseek-tui >= 0.8.5, <= 0.8.41'
  - 'deepseek-tui >= 0.8.5, < 0.8.41'
  - 'codewhale-tui >= 0.8.41, < 0.8.64'
  - 'codewhale >= 0.8.41, < 0.8.64'
patched:
  - deepseek-tui 0.8.41
  - codewhale-tui 0.8.64
  - codewhale 0.8.64
published: '2026-08-18'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:32:39.347'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75856'
references:
  - url: >-
      https://github.com/Hmbown/CodeWhale/commit/26de44a8bd5051f8f944ea60b2c37ae1d2b7d25e
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Hmbown/CodeWhale/security/advisories/GHSA-6v2g-fpxh-pmmh
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/codewhale-before-ssrf-bypass-via-dns-pinning-toctou
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Hmbown/CodeWhale/security/advisories/GHSA-6v2g-fpxh-pmmh
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75856'
  - url: 'https://github.com/advisories/GHSA-6v2g-fpxh-pmmh'
tags:
  - nvd
  - ghsa
  - rust
epss: 0.00495
epssPercentile: 0.39804
aliases:
  - GHSA-6v2g-fpxh-pmmh
ecosystem: rust
ingestedAt: '2026-09-04T18:25:57.068Z'
---

## Overview

CodeWhale before 0.8.64 contains a server-side request forgery bypass vulnerability in DNS pinning logic that fails to prevent time-of-check-time-of-use attacks. Attackers can manipulate DNS responses to fail initial resolution checks and succeed on secondary requests, allowing requests to internal IP addresses and bypassing SSRF mitigations.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-75856)

Affected packages:

- `deepseek-tui >= 0.8.5, <= 0.8.41`
- `deepseek-tui >= 0.8.5, < 0.8.41`
- `codewhale-tui >= 0.8.41, < 0.8.64`
- `codewhale >= 0.8.41, < 0.8.64`

Patched in:

- `deepseek-tui 0.8.41`
- `codewhale-tui 0.8.64`
- `codewhale 0.8.64`

Source: https://github.com/advisories/GHSA-6v2g-fpxh-pmmh